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Lorenzo 'kelset' Sciandra

@kelset.dev
1.6K followers 575 following 1K posts

Staff Eng @ Shopify (building Shop) Former @reactnative.dev core maintainer Ex @microsoft.com @sovereign.tech open source • tech • mental health • agentic 🕸️ kelset.dev 🏠 London, UK

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Reposted by Lorenzo 'kelset' Sciandra
Federico Viticci @viticci.macstories.net · 21/09/2026
This M5 Ultra Mac Studio feels made for Qwen3.8-Flash-Next. - 100+ TPS at 4 or 5-bit - Token prefill is up 150% (!) compared to M3 Ultra - Can use subagents with room to spare Flash-Next feels GREAT for agentic coding, especially at these speeds. www.macstories.net/stories/m5-u...
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Lorenzo 'kelset' Sciandra @kelset.dev · 21/09/2026
finallyyyyyyyyy
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/09/2026
Apple why are you playing with my heart 😭 27.1 not even out 27.2 beta out without Duo why 💔
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Lorenzo 'kelset' Sciandra @kelset.dev · 17/09/2026
The Android team released v2 of their benchmark for LLMs: android-developers.googleblog.com/2026/09/and... not surprised to see GPT Sol and Astra on top (together with Fable) - matches my experience (still waiting for a good eval for the Swift/SwiftUI side 🫠)
android-developers.googleblog.com
Android Bench 2.0: Pushing the frontier with challenging long-horizon tasks
News and insights on the Android platform, developer tools, and events.
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Lorenzo 'kelset' Sciandra @kelset.dev · 15/09/2026
ok so i installed iOS 27.0 on my phone.... is it just me or is the virtual keyboard worse? like, actually less smooth?
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Reposted by Lorenzo 'kelset' Sciandra
Alex @alexdln.com · 14/09/2026
11 years ago, Node.js and io.js merged back into one project
A screenshot of the npmx.dev homepage with an updated logo dedicated to the io.js and node.js merge
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/09/2026
I think we were all very surprised in a positive way by Compose and how well it handled some of our more demanding components like the main home and its feed
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/09/2026
I think strong fundamentals, good CI, and having a team big enough that folks could work in parallel on both platforms (plus ofc having agents for everything etc etc)
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
I have to close it with a note on React Native: I still love the community to bits, and I've poured years of my life into it, and got a lot out of it. Simply, as mentioned by Mustafa, it wasn't the right tradeoff anymore here. I'm sure it will keep serving well devs. ty, rn 🫡
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
i'm a nerd, and there's so much I wanna dive in, even in mindset and vision changes (it is indeed true that, in the age of agentic, refactoring is cheap). At some point I'll do a talk, or something. We've sailed in uncharted waters, and I want people to learn from us.
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
two observation, just to put some sprinkles on top: • if a migration takes weeks, there's not enough time for the backlog to grow so big to add more weeks at the end • having a hard rollout deadline is a great forcing function to make things happen
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
for now, I'd suggest you start with the 2 posts: the broad strokes one, with the overall vision and what changed in Shopify around mobile shopify.engineering/back-to-native and then the one with some more details about the Shop migration: shopify.engineering/shop-app-mi...
shopify.engineering
Migrating Shop app from React Native to native (2026) - Shopify
We migrated the Shop app from React Native to Swift and Kotlin, going from proof-of-concept to publishing in 12 weeks with the help of AI.
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
there's so much, SO MUCH I want to chat about and tell about what we've experienced, what we've learned, what we've found and what we've figured out. Comments on the decisions, on what we'd do differently now, etc etc ...we'll get there at some point. not today, im too X_X
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Lorenzo 'kelset' Sciandra @kelset.dev · 10/09/2026
the cat is out of the bag: we have rebuilt from the ground up Shop in SwiftUI and Jetpack Compose. it still feels weird to think that it actually worked out lol. needless to say, it was a crazy few months. Can you believe it? full rewrite, and now it's already out in prod 🤯
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
We are truly living through a full mindshift of what software building is, and what you need to do and what are the tools in your belt. I'm lucky to be in a place where I can experience it full power in first person (the good and the bad). Onto the next year 🧑‍💻🤖🧑‍💻
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
I've hit that bug around 10:30am, and by... somewhen between 2 and 3pm, the fix rolled out in prod - after some backenders and colleagues from the area owning team were looped into the whole situation and reviewed&approved my River PR.
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
that then River went ahead and took care of until the PR was ready to go and CI was green. It did loop on that PR basically unsupervised, while I was digging deeper with a secondary River instance into the details and impact of the bug across prod, looking through data.
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
used a fourth agent in Slack to dig into that (River, you might have heard about it from Tobi here x.com/tobi/status... ) and via it I made a PR to fix this backend issue (in an area of code I've never touched before) and then a different CI reviewer agent flagged something
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
Literally today (not making this up) I was coding our Shop mobile apps with my local agents, in parallel reviewing/tophatting a colleague's PR, hit a bug while testing it, spun up a different agent to help me debug it, figured out it was a backend issue,
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Lorenzo 'kelset' Sciandra @kelset.dev · 11/08/2026
today's my 1st anniversary at Shopify - it's borderline insane how much the role of software engineer has shifted in a year. Been in this company genuinely feels like living at the bleeding edge at what coding is shaping up to be:
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Reposted by Lorenzo 'kelset' Sciandra
Hermione, Texas Granger @misterfungi.bsky.social · 11/12/2023
the Wikipedia entry for axolotls reads like a Cake song
Their heads are wide, and their eyes are lidless. Their limbs are underdeveloped and possess long, thin digits.
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Lorenzo 'kelset' Sciandra @kelset.dev · 29/07/2026
on the topic of using Claude Desktop for personal projects, happy to report that Claude Design now actually is quite good indeed - last time I tested it it was when it was first rolled out in beta and it's night and then since then
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Lorenzo 'kelset' Sciandra @kelset.dev · 27/07/2026
i use LLMs via CLI at work (pi for the win) so despite being aware of such a thing, i was pleasantly surprised when i told Opus 5 in the claude dsk app about a mobile specific bug for the website i cooked a while ago it just went "well i have the iOS sim, might as well" 👏
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Lorenzo 'kelset' Sciandra @kelset.dev · 26/07/2026
interesting - first time I'm seeing an AI being "self-aware" ahead of time about its token/usage quota (opus 5, mid) 👀
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/07/2026
(i asked it to redo my website from scratch (V2), then told it "ok, this one cool idea is good, throw away the implementation and do a new wild take on that thing" and yet he didn't. V3 of the website looked super close to V2 in the things I explicitly told it to not do anymore)
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/07/2026
to be clear: that was intentionally something that I wanted to test and validate for myself. I guess I'm just sad/disappointed that even this new class of models can't dig itself out of the direction it picks at the start. but it's also good to know for the future.
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/07/2026
quick update from two "5hrs limits" later: Fable seems to have the exact same issue as every other model - once it funnel itself into an idea, it doesn't get out of it no matter what I said. I literally told it to throw away all the code and restart again, and yet he stuck to it
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/07/2026
im gonna be far from my personal laptop for a few days so decided to crank things up to max and just give it a big chonky task to see what it'd end up with 🍿 also just realised that it's the first time i'm pushing ANY model above xthink (always got "scared" by cost/consumption)
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Lorenzo 'kelset' Sciandra @kelset.dev · 17/07/2026
and to be fair, also last week Jetbrains announced the same for Kotlin: blog.jetbrains.com/kotlin/2026... ...but the models chart is so outdated 🫠 🔗 kotlinlang.org/benchmark/
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Lorenzo 'kelset' Sciandra @kelset.dev · 17/07/2026
ICYMI last week the Android team revamped their eval board for Android and ngl I'm somewhat surprised how much better than opus 4.8 Sonnet 5 is. (it's still missing the latest 5.6 gpt rounds tho) 🔗 developer.android.com/bench && announcement: android-developers.googleblog.com/2026/07/and...
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Lorenzo 'kelset' Sciandra @kelset.dev · 17/07/2026
can't believe y'all convinced me to start using a software that doesn't let me programmatically change tab colors 🫠 (also, very mixed feelings about their "vouching system"...) github.com/ghostty-org...
github.com
Feature Request: automatic tab coloring via escape sequence · Issue #12235 · ghostty-org/ghostty
Problem Ghostty supports manual tab coloring (#2509, #10474) and a colorize_tab input binding is in progress (#11085), but there's no way to change a tab's color automatically from a runnin...
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Reposted by Lorenzo 'kelset' Sciandra
Brittany Ellich @brittanyellich.com · 15/07/2026
Are you going to Chain React? Do you want to? 👀 Join @anniesexton.com and I for a pre conference workshop July 29 on Putting Yourself Out There, for folks from underrepresented backgrounds in tech interested in sharing your unique perspective, and get a FREE ticket to the conference, too!
ti.to
Chain React 2026
Chain React is a three-day event exploring the latest in React Native. It features a 1-day workshop followed by a 2-day conference that brings together leaders from companies such as Meta, Amazon, and...
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Lorenzo 'kelset' Sciandra @kelset.dev · 14/07/2026
soooo dotfile repos. send me yours (if it's a public one ofc!) - I'm so curious to compare with mine 😂 ...which right now I'm keeping private 😇 (side effect of me actually trying to move over to ghostty 👀)
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Lorenzo 'kelset' Sciandra @kelset.dev · 09/07/2026
Anything else on top feels optional - but honestly I'm open to suggestions! What should I consider for future small/mid websites?
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Lorenzo 'kelset' Sciandra @kelset.dev · 09/07/2026
infra: namecheap + github + netlify toolset: bun + astro + typescript mcps: chrome devtools + MDN + netlify skills: impeccable models: opus 4.8 AND/OR fable 5 AND/OR gpt5.5
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Lorenzo 'kelset' Sciandra @kelset.dev · 09/07/2026
been using a portfolio website project (not for myself) as my personal project/test bench for models. Aside from the sheer fact that Fable allowed me to reach UI levels unreachable before, here are what I think my key elements if I ever had to do another simple/mid website 🧵
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Lorenzo 'kelset' Sciandra @kelset.dev · 29/06/2026
a bit late on this one but i immediately installed on my personal machine and will keep it there forever: MDN is great and i'm sure having the agents able to leverage it better/more directly is gonna make website building better overall 🔗 developer.mozilla.org/en-US/blog/...
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Lorenzo 'kelset' Sciandra @kelset.dev · 24/06/2026
folks i need to expand my horizon, what are some good swift and android newsletters? Something like "this week in react" but for those two native platforms. send me your recs 📩
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Lorenzo 'kelset' Sciandra @kelset.dev · 22/06/2026
been hearing about headroom lately - have you used it? thoughts? 🍿 🔗 github.com/chopratejas...
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Lorenzo 'kelset' Sciandra @kelset.dev · 18/06/2026
someone's feeling scottish today 🤖
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Lorenzo 'kelset' Sciandra @kelset.dev · 17/06/2026
I don't know about y'all but I feel that lately gpt 5.5 has been degrading quite significantly... I'll switch my core flows to opus 4.8 for a few days and see if it performs 🍿
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Lorenzo 'kelset' Sciandra @kelset.dev · 16/06/2026
...ok but where are Sonnet and Haiku 4.8 👀
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Lorenzo 'kelset' Sciandra @kelset.dev · 13/06/2026
and the whole project is fully OSS: 🔗 minebench.ai 🔗 github.com/Ammaar-Alam... highly highly rec for good insights and token and price comparisons U_U (and yes ofc the entire geopolitic aspect of this fable thing is fascinating to say the least)
github.com
GitHub - Ammaar-Alam/minebench: Minecraft-style voxel benchmark for comparing AI models (Arena + Sandbox)
Minecraft-style voxel benchmark for comparing AI models (Arena + Sandbox) - Ammaar-Alam/minebench
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Lorenzo 'kelset' Sciandra @kelset.dev · 13/06/2026
from what i've read, tbh, I think that we'll see mythos & fable back up sooner than we think. BUT while we wait I want to put a spotlight on one of my fav benchmarks out there: minebench. The author always does great breakdowns, like this one: www.reddit.com/r/singulari...
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Lorenzo 'kelset' Sciandra @kelset.dev · 12/06/2026
I need more convincing. Give me some examples or pointers as to how I can interact with it to get enchanted 👀
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Lorenzo 'kelset' Sciandra @kelset.dev · 12/06/2026
...and given the higher cost/lower token availability and how it feels like a disruption/change that you can't leverage with other models, I'm not sure it's worth the tradeoff.
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Lorenzo 'kelset' Sciandra @kelset.dev · 12/06/2026
In my experience so far I've seen glimpse of this "big shift" but I've also read that you're supposed to change your AGENTS.md/CLAUDE.md and such and overall revolutionise your approach to AI
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Lorenzo 'kelset' Sciandra @kelset.dev · 12/06/2026
allright let's talk Fable now for a second: I see quite a few folks talking about it with very big praise. What prompts have you used? How did you interact with it?
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Reposted by Lorenzo 'kelset' Sciandra
Seb ⚛️ ThisWeekInReact.com @sebastienlorber.com · 10/06/2026
⚛️ React repos just moved! GitHub org: /facebook ➡️ /react This reflects the transition to the React Foundation (which will likely be today's newsletter headline BTW)
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Lorenzo 'kelset' Sciandra @kelset.dev · 09/06/2026
from this page in the docs: developer.apple.com/documentati... and this is the Android CLI i'm talking about: developer.android.com/tools/agent... (and yes I'll poke a bit at Mythos and Fable soon 🍿)
developer.android.com
Overview of Android CLI  |  Android Studio  |  Android Developers
The Android CLI is a command-line interface that enables you to more easily and efficiently build for Android using any tool of your choice.
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